Hi there, I'm about to do my differentials, wondering if I could use the 75w-140 synthetic gear lubricant on the front and back? Will I void my warrenty and will it do any harm? Also, I can't find how many litres I need....would appreciate any help.

Hi there, I'm about to do my differentials, wondering if I could use the 75w-140 synthetic gear lubricant on the front and back? Will I void my warrenty and will it do any harm? Also, I can't find how many litres I need....would appreciate any help.

I personally wouldn't put Synthetic in my D35 just because I hate it. One of these days, that D35 is going to get angry at me and snap. If you do frequent water crossings, I also wouldn't put expensive gear oil in it.